Stereoscopic telemeter with traveling mark.



U. VON HOPE.

STBREOSGOPIC TELBMETEB WITH TRAVELING MARK. APPLICATION FILED mmzo, 1908.

934,916,, I Patented Sept. 21, 1909.

M 1000 V V V reiaire shifting, into the S21E18 depth.

33 QJEVGN 130F111, OF JENA, GERMANY, ASSIGNOR TG THE FIRM F CARL ZEIfiS,

OF JENA, GEBIVIANY.

STEEREOSCOPIC TELEMETER "WITH TRAVELING MJStBK.

Specification 61 Letters Patent.

Application filed January 1 998, Serial No. 411,858

To cl 5e it known tlmt'l, CHRISTIAN VON Horn,

7 r o citizen of the German Empire, and resid- Z w? m it may concern.

ing at Corl-Zeiss strassc, Jena, in the Grand Duchy of Eli-KG lVeiinar, (lernnmy have inrented it new and useful Stereoscopic 'lelerneter with Traveling Mark, of which the following a specification.

The invention consists in an improvement in stereoscopic telemeters having :1 trm'eling mark that is to say, in all such 'teleineterc, in which a relative shifting between :1 stereoscopic nieasuring mark and a stereoscopic landscape image is produced in the direction of depth by :1 micromctricul appliance. in these instruments the dis tance is read oft upon a micrometer. scale external to the stereoscopic licltl oi view, a the measuring mark and the image of the object, whose distance is to be determined, have brought, through the said The two simplest means producing that shifting are already made known through the patent sp :ilioelion 583,703: The adjustment of the roiorometriczil appliance has to produce al'irizontel displacement, in one of the two ocular ljclcls either of the physical component of the stereoscopic i'ncasuring mark, hereafter called con'iponent mnrk, or of the optical componentol inc-stereoscopic inuige the landscape.

measuring the zit-restor which more in which Eric I] 1 led tpnte so distance of objects, but slowly great :1 rapidity in taking CHcl. as; with the other. more simple stereoscopic lelen'ual'mj', the list-d HlllL lelcmolcr, E

but on the other hand 21 grcutor ac uracy,

superiority (1 or view, there is not to ho I easurr-zmonls with the 1 ruvoliug murlqiolclm xporience has. however, shown, that tho 1 of the instrumoi'il with \ravclm' 1 mark over the other instrument us regards I there no lorcgrouml; only thrsky.

1 regular order.

measuring mark is situated but not in the some depth. This arrangement, Whose perfect; success experience has proved, has arisen from the following consideration In measuring the distance of an object by means of a traveling measuring mark only the relative position or tl'ie'stereoscopic measuring mark on the one hand and of the stereoscopic image of the object to be measured on the other is to be estimated, so that in this respect measuring mark and image of the object are of equal quality Hence the some enhancement of the occur ficy of measurement, which arises in making use of the isolated measuring mark when passing liron'i an object isolated in the direction of deptii to another having a foreground or :r background, to he expected from the arrangement of an auxiliary mark in front of or behind the i'l'l 8ti5ll1lllf f mark for the nu-rasurement upon the isolated object.

In the annexed drawing: Figure l reprel sents on an enlarged scale a system of mmponent marks adopted to be fixed in the left a stereoscopic telemetcr with traveling mark constructed according to the invention. Fig. 2 represents the mark system for the right licld Fig. 3 s 21 sectional plan View of a traveling mark tci neter.

The auxiliary mark is-----li l e the meesur' ing mark '--pro(luced by two mmponent. marks, one in each ocular field. in order to \e the stormsco 'iic auxiliary mark a position in another depth than the stereoscopic measuring mark, the distance between the two component auxiliary marks must (lillcr from the distance between the two coi'nponcut measuring marks. ll comcnientto have the component marks of each ocular field maintaining an uuultornhlc position rel.- atively to one another. in employing two of the some l'elcmeter.

or more auxiliary marks. the component marks of each ocular field are best arranged in a straight line. so that the stereoscopic marks likewise form a straight lined row. it is oi especial value when the intervals nl;-;o in such a row of n'uirlzs are suhiooli to :i l'ilnking the measuring marl: a mcmhcr in :1 straight lined and regular row of marks has proved, according to present oxpcrieucos still more favorable for the accubination with a single auxiliary mark or with racy of the measurement than its mere com-f be occupied by a mark or not theadvantage gained in accuracy from measuring with a regular row of marks is enhanced by arrangin so mchnedftoaud combined with one another, that the measuring mark is a member ofall the rows.-

The left and .right component mark systemsshown in Figs. 1 and 2 respectively produce a. stereoscoplc mark system, in which a big measuring placed in the crossing po nt of two regular rows of small auxiliary marks, so that it is common to both rows.

Finally, the re ular row of marks may contribute to ren er thetraveling mark telemeter available for measuring the distance of such objects which move rapidly .in the field of view, that is "to say, available for a fixed ,scale telemeter.

urpose for which, as indicated above, the e scale telemeter is better adapted. A

' stereoscopic scale may be formedfrom the row of marks by adding, as shown in Figs. 1 and 2, numerals which give the distances of the red marks for a definite position of the micrometrical appliance, the numeral of the hitherto sole measuring mark being the same which can in the said position be read oif on the micrometrical scale. On this value of the scale the micrometrical appliance has to be adjusted, if the traveling mark telemeter he occasionally desired to be used as In 'the traveling mark telemeter shown in Fig. 3, either telescopic system consists of an optical square prism a, an objective lens 6, an ocularprism 0 having a ridge surface,

.a mark plate d, a field lens 6, a double refiectihg prism f and an eye lens g, .thedouble reflecting prism and the eye lens being rotatahle about the axis'ofthe fieldleiis for the pur ose of adapting the distance be tween t e eye. lenses to the interpupilary distance. The left and the right mark plate carry each a component mark system, for instance, such as shown in Fi s. 1 and .2 respectivel The right markp ate is shiftably moun ed and rigidly connected with-a micrometric screw it. The nut of this screw carries a cylindrical scale 4' projecting throu h the casing of the telemeter so as to em lo the operator to rotate it. An index two. .ormore-such rows of marks a is fastened. on the, casi -Riitating the scale Shifts the ri ht mark plate axhd thereby causes the trave ing of the entire stereoscopic mark syste r I claim 1. In a stereoscopic telemeter of the travel- "ing-mark type a pair of oculars, a pair of objectives for projecting a pair of object images in the fields of the pair of oculars, a pair of mark plates in the ocular fields,

means for producing, in-one ocular field, a

relative displacement of theobject image an the mark plate, a distance scale connected with this displacing means, an index for the scale, a pair of component measuring marks provided on the pew of mark plates, and a pair of component auxiliary marks likewise provided on the pair of mark plates in proximity to the component measuring marks,

the distance between the two componentauxiliary marksbeing different from that between the vtwo component measuring marks.

2. .In a stereoscopic telemeter of the traveling marktype a pair of oculars, a pair of objectives for projecting a pair of object images in thefields of the air of oculars, a

pair of mark plates in tie ocular fields,

means for producing, in one ocular field, a relative displacement of the object image and the mark plate, a distance scale conndcted with this displacing means, an index for the scale, a air of component measuring marks provi ed on the pai'r of mark plates, and a plurality of pairs of component auxiliary marks likewise provided on the pair of mark plates in proximity to the component measuring marks, in each pair of component auxiliary marks the distance between the marks'being difierent from that between the two com nent measuring marks and in each ocu ar field the component marks bei arranged in a straight lined row with a regular order of intervals.

3. In a stereoscopic telemeter of the travel ing mark 'type a pair of oculars, a pair of 1 ob ectives for projecting a pair of object f images in the fields of the pair of oculars, a i

pair of mark plates in the ocular fields, means .for producing, in one ocular field, a

marks being differenttfrom that betweenthe two component measuring marks and in each ocular field the component marks being arranged in at least two straight lined'.-ro\vs inclined to each other, with a regular order 11 5 relativedisplacementof the object image of. intervals in each row and with the measuymg mark forming a member 0t all the 101 13;

42. in a stereoscopic t eiemeter oi the travel- 5 ing mank 1gp a pair 01? ocuiars, apair 0f- 2m 0t Ob ect,

obimtivesv qr projecting a images in the fieids ofih e gag! 0f ocuisu's a pair Of mark plates in fine acular fields, 11mins for producing, in {H16 Qcuiar field, a 'mlative displacement f the objectimag and rim, Ill3l'i il)1&t-,.fl distance scale cennected with means, an index for the :w-wiza, a, air! Qgimponent measuring marks I w idqt; mark. b1abe 3, and a plurality 0f pairs 0f cuiiipcnent auziiiarji wuing marks, in each pair 01" compenent auxiliary-marks the (iismnce betwem' ihe marks heir; different from thatiaetween the two 20 component measuring marks and in a plurality of pairs of component marks two identical numerals being arranged one near each mark of each pair.

'. CHRISTIAN-1 9B? HQFE:

Witnesses:

PAUL Kafiam, AnoLF MZUPER. 

